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pinctrl: st: Pass irqchip when adding gpiochip 

We need to convert all old gpio irqchips to pass the irqchip
setup along when adding the gpio_chip. For more info see
drivers/gpio/TODO.

For chained irqchips this is a pretty straight-forward
conversion: the ST pin controller errors out of adding a
irqchip if the interrupt is invalid or missing or if the
irqmux is not present: the irqchip should not be added
if either of these errors happen, so rewrite the code to
deal with that. Keep the exit path where the gpio_chip
is added no matter what the status of the irq is.

Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191001135147.29416-1-linus.walleij@linaro.org
This commit is contained in:
Linus Walleij 2019-10-01 15:51:47 +02:00
parent 35dea5d746
commit c77a4de2bb
1 changed files with 32 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/pinctrl/pinctrl-st.c
View File

@ -1477,7 +1477,7 @@ static int st_gpiolib_register_bank(struct st_pinctrl *info,
struct device *dev = info->dev;
int bank_num = of_alias_get_id(np, "gpio");
struct resource res, irq_res;
int gpio_irq = 0, err;
int err;
if (of_address_to_resource(np, 0, &res))
return -ENODEV;
@ -1500,12 +1500,6 @@ static int st_gpiolib_register_bank(struct st_pinctrl *info,
range->pin_base = range->base = range->id * ST_GPIO_PINS_PER_BANK;
range->npins = bank->gpio_chip.ngpio;
range->gc = &bank->gpio_chip;
err = gpiochip_add_data(&bank->gpio_chip, bank);
if (err) {
dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_num);
return err;
}
dev_info(dev, "%s bank added.\n", range->name);
/**
* GPIO bank can have one of the two possible types of
@ -1527,23 +1521,40 @@ static int st_gpiolib_register_bank(struct st_pinctrl *info,
*/
if (of_irq_to_resource(np, 0, &irq_res) > 0) {
gpio_irq = irq_res.start;
gpiochip_set_chained_irqchip(&bank->gpio_chip, &st_gpio_irqchip,
gpio_irq, st_gpio_irq_handler);
struct gpio_irq_chip *girq;
int gpio_irq = irq_res.start;
/* This is not a valid IRQ */
if (gpio_irq <= 0) {
dev_err(dev, "invalid IRQ for %pOF bank\n", np);
goto skip_irq;
}
/* We need to have a mux as well */
if (!info->irqmux_base) {
dev_err(dev, "no irqmux for %pOF bank\n", np);
goto skip_irq;
}
girq = &bank->gpio_chip.irq;
girq->chip = &st_gpio_irqchip;
girq->parent_handler = st_gpio_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents),
GFP_KERNEL);
if (!girq->parents)
return -ENOMEM;
girq->parents[0] = gpio_irq;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_simple_irq;
}
if (info->irqmux_base || gpio_irq > 0) {
err = gpiochip_irqchip_add(&bank->gpio_chip, &st_gpio_irqchip,
0, handle_simple_irq,
IRQ_TYPE_NONE);
if (err) {
gpiochip_remove(&bank->gpio_chip);
dev_info(dev, "could not add irqchip\n");
return err;
}
} else {
dev_info(dev, "No IRQ support for %pOF bank\n", np);
skip_irq:
err = gpiochip_add_data(&bank->gpio_chip, bank);
if (err) {
dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_num);
return err;
}
dev_info(dev, "%s bank added.\n", range->name);
return 0;
}